CN209992991U

CN209992991U - Optical detection device and electronic apparatus

Info

Publication number: CN209992991U
Application number: CN201922319048.XU
Authority: CN
Inventors: 周扬; 朱文龙
Original assignee: Shenzhen Fushi Technology Co Ltd
Current assignee: Shenzhen Fushi Technology Co Ltd
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-01-24
Anticipated expiration: 2029-12-23

Abstract

The utility model discloses an optical detection device, including protective layer, display module assembly, center, transmission module assembly and leaded light unit. The protective layer includes a transparent region and a non-transparent region located around the transparent region. The display module is positioned below the protective layer and emits visible light through the transparent area to realize information display. The middle frame is positioned below the display module and is provided with a first opening positioned below the non-transparent area. The transmitting module is positioned below the middle frame and used for transmitting a detection light beam for biological characteristic detection. The light guide unit is arranged below the non-transparent area and comprises a light incoming surface adjacent to the emission module and a light outgoing surface adjacent to the protective layer, detection light beams emitted by the emission module can enter the light guide unit from the light incoming surface and leave the light guide unit from the light outgoing surface after being reflected inside the light guide unit, and the detection light beams leaving the light guide unit can penetrate through the protective layer to exit to the upper side of the protective layer.

Description

Optical detection device and electronic apparatus

Technical Field

The utility model relates to the field of photoelectric technology, especially, relate to an optical detection device and electronic equipment that utilize optical imaging to realize biological feature detection.

Background

With the technical progress and the improvement of living standard of people, users demand more functions and fashionable appearance for electronic products such as mobile phones, tablet computers, cameras and the like. At present, the development trend of electronic products such as mobile phones and the like is to have a higher screen occupation ratio and have fingerprint detection or other biological characteristic detection functions. In order to realize a full screen or a nearly full screen effect, an electronic product has a high screen occupation ratio, and a biological characteristic detection technology under the screen is developed. For non-self-luminous displays such as Liquid Crystal Displays (LCDs), achieving sub-screen biometric sensing requires providing an actively emitting light source, using the light source to emit a sensing beam to an external object, and then receiving the sensing beam with biometric information of the external object back from the external object. In order to prevent the information display of the liquid crystal display from being affected, it is generally necessary to additionally provide a light source for providing invisible light used as a detection beam of biometric information. Because the inner space of the electronic product is narrow, how to set the light source and realize the biological characteristic detection under the screen is a problem to be solved in the prior art.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides an optical detection device and electronic equipment that can solve prior art problem.

An aspect of the present invention provides an optical detection apparatus, including:

a protective layer comprising a transparent region and a non-transparent region located around the transparent region;

the display module is positioned below the protective layer and can emit visible light through the transparent area to realize information display;

the middle frame is positioned below the display module and provided with a first opening positioned below the non-transparent area, and the middle frame is used for supporting the display module;

the transmitting module is at least partially positioned below the middle frame or at least partially positioned in the first opening, and is used for transmitting a detection light beam for biological characteristic detection, wherein the detection light beam is invisible light;

the light guide unit is at least partially located below the non-transparent area and comprises a light incoming surface adjacent to the emission module and a light outgoing surface adjacent to the protective layer, the detection light beam emitted by the emission module can enter the light guide unit from the light incoming surface and leaves the light guide unit from the light outgoing surface after being reflected inside the light guide unit, and the detection light beam leaving the light guide unit can pass through the protective layer to exit to the top of the protective layer.

In some embodiments, the light emitting surface is located above the middle frame and below the non-transparent region, the light emitting surface is adjacent to the protective layer, at least part of the light incident surface faces the emission module, the light guide unit further includes a reflecting surface, the reflecting surface is part or all of the surface of the light guide unit except the light incident surface and the light emitting surface, and the reflecting surface is used for reflecting the detection light beam entering the light guide unit.

In some embodiments, when at least part of the emission module is located below the middle frame, at least part of the light incident surface is located below the middle frame; when at least part of the emission module is positioned in the first opening, at least part of the light incident surface is positioned in the first opening.

In some embodiments, the protection layer includes an upper surface and a lower surface that are disposed opposite to each other, the upper surface includes an upper surface of the transparent region and an upper surface of the non-transparent region, the lower surface includes a lower surface of the transparent region and a lower surface of the non-transparent region, the upper surface of the protection layer has a detection region that can be directly touched by an external object, when the external object contacts the detection region, a detection beam emitted above the protection layer can enter the inside of the external object and then be transmitted, the transmitted detection beam can enter the protection layer from the detection region, and the orthographic projection of the emission module on the upper surface of the protection layer is located between the orthographic projection of the light guide unit on the upper surface and the detection region.

In some embodiments, the area where the detection light beam exiting from the light guide unit exits from the upper surface of the protective layer is an exit area, and the exit area and the detection area do not overlap or partially overlap.

In some embodiments, the light guide unit includes a first light guide part adjacent to the emission module and a second light guide part adjacent to the protective layer, the first light guide part includes the light incident surface, the second light guide part includes the light emitting surface, and all of the first light guide part is located below a non-transparent region of the protective layer, or a part of the first light guide part is located below the non-transparent region and a part of the first light guide part is located below the transparent region, or all of the first light guide part is located below the transparent region; at least a portion of the second light directing portion is positioned below the non-transparent region.

In some embodiments, part or all of the emission module is located below the transparent region of the protection layer, or part or all of the emission module is located below the non-transparent region of the protection layer.

In some embodiments, the emission module includes a light emitting unit for emitting the detection light beam, and the light emitting unit includes a light emitting surface for emitting the detection light beam, and the light emitting surface faces the light incident surface.

In some embodiments, the light guide unit includes a first light guide part adjacent to the emission module and a second light guide part adjacent to the protective layer, the second light guide part being coupled to the first light guide part, the second light guide part having a coupling portion coupled to the first light guide part, the second light guide part extending upward from the coupling portion to a position adjacent to a lower surface of the non-transparent region, at least a portion of the second light guide part being located above the first opening.

In some embodiments, at least a portion of the first light directing portion is positioned below the middle bezel when at least a portion of the emission module is positioned below the middle bezel; when at least part of the emission module is positioned in the first opening, at least part of the first light guide part is positioned in the first opening.

In some embodiments, a thickness of the second light guiding portion is smaller than a height of the emission module, the thickness of the second light guiding portion is a length of the second light guiding portion along a length direction of the protection layer, and the height of the emission module is a length of the emission module along the thickness direction of the protection layer.

In some embodiments, the emission module includes a light emitting unit for emitting the detection light beam, the light emitting unit is disposed adjacent to the light incident surface of the first light guide portion, the height of the first light guide portion is greater than or equal to the height of the light emitting unit, the height of the first light guide portion is a length of the first light guide portion in a thickness direction of the protective layer, and the height of the light emitting unit is a length of the light emitting unit in the thickness direction of the protective layer.

In some embodiments, an end surface of the first light guide portion is the light incident surface, an end surface of the second light guide portion is the light emitting surface, and the remaining parts or all surfaces of the first light guide portion and the second light guide portion except the light incident surface and the light emitting surface are reflection surfaces, a detection light beam can enter the light guide unit from the light incident surface, and leave the light guide unit from the light emitting surface after being reflected by the reflection surfaces in the light guide unit, and the detection light beam is transmitted inside the light guide unit by being reflected on the reflection surfaces.

In some embodiments, the reflective surface includes a chamfered surface that is a chamfered slope at a junction of the first light directing portion and the second light directing portion.

In some embodiments, the light guide unit includes a main body and a light reflecting material, the light reflecting material covers at least a part of the surface of the main body to form the reflecting surface, and the light reflecting material can reflect the detection light beam; or the light guide unit is made of a material which can enable the detection light beam to be transmitted in a total reflection manner in the light guide unit, and the detection light beam is totally reflected in the light guide unit.

In some embodiments, the protection layer has an upper surface and a lower surface which are opposite to each other, the display module is disposed adjacent to the lower surface of the protection layer, the upper surface of the protection layer includes a detection area for an external object to touch, a detection beam can enter the external object and then be transmitted out, and can enter the protection layer from the detection area, the light exit surface is disposed to be inclined with respect to the upper surface of the protection layer, any point of the light exit surface is used as a reference point, a normal perpendicular to the light exit surface is made from the reference point, the normal and the upper surface have an intersection point, and the intersection point is located between an orthographic projection of the reference point on the upper surface and the detection area.

In some embodiments, the light guide unit includes a first light guide portion and a second light guide portion, the first light guide portion and the second light guide portion are connected, the first light guide portion is adjacent to the emission module, the second light guide portion extends upward from a connection with the first light guide portion to a position near a lower side of the protective layer, the first light guide portion includes the light incident surface, the emission module includes a light emitting unit, the light emitting unit includes a light emitting surface for emitting the detection light beam, at least a portion of the light incident surface of the first light guide portion faces the light emitting surface of the light emitting unit, the second light guide portion includes the light emitting surface, the first light guide portion and the second light guide portion further include a reflecting surface, the reflecting surface is a portion or a whole surface of the light guide unit except the light incident surface and the light emitting surface, and the detection light beam emitted by the light emitting unit can enter the light guide unit from the light incident surface, and the light guide unit is internally reflected by the reflecting surface and then leaves the light guide unit from the light emergent surface.

In some embodiments, the protective layer includes an upper surface and a lower surface that are disposed opposite to each other, the second light guiding portion further includes a first sub-reflective surface and a second sub-reflective surface, the first sub-reflective surface and the second sub-reflective surface are at least part of the reflective surface, the light emitting surface and the second sub-reflective surface are connected and disposed adjacent to the lower surface of the protective layer, the first sub-reflective surface is located below the light emitting surface, a part or all of the first sub-reflective surface is located below the second sub-reflective surface, the second sub-reflective surface and the light emitting surface are both disposed obliquely relative to the upper surface, or the second sub-reflective surface is perpendicular to the upper surface and the light emitting surface is disposed obliquely relative to the upper surface, or the second sub-reflective surface is tilted relative to the upper surface and the light emitting surface is disposed perpendicularly relative to the upper surface of the protective layer.

In some embodiments, the upper surface of the protection layer includes a detection area for being touched by an external object, a detection beam can enter the detection area and then be transmitted out, and can enter the protection layer from the detection area, when the second sub-emitting surface and the light emitting surface are both disposed obliquely with respect to the upper surface, an orthogonal projection of the light emitting surface on the upper surface of the protection layer is closer to the upper surface of the transparent area of the protection layer than an orthogonal projection of the second sub-reflecting surface on the upper surface, a plane perpendicular to the upper surface in a thickness direction from an intersection line of the second sub-reflecting surface and the light emitting surface is defined as a first reference surface, a plane perpendicular to the upper surface and parallel to the first reference surface and including a center point of the detection area is defined as a second reference surface, a perpendicular distance between the first reference surface and the second reference surface is a first reference distance, the first reference distance is 12 mm to 16 mm, and the second included angle is 27 degrees to 35 degrees.

In some embodiments, projection heights of the light emitting surface and the second sub-reflecting surface in a plane parallel to a width direction of the protective layer and perpendicular to the upper surface of the protective layer are equal, the projection heights are 0.3 mm to 0.5 mm, and a thickness of the second light guiding portion along a length direction of the protective layer is less than 0.3 mm.

In some embodiments, the emission module includes a light emitting unit and a second circuit substrate, the light emitting unit is disposed on the second circuit substrate, the light-emitting unit is used for emitting detection beams and is electrically connected with the second circuit substrate, the second circuit substrate is used for providing electric signals for the light-emitting unit and comprises a flange part and a web part, the flange part comprises a first flange part, a second flange part and a middle part, the first flange part and the second flange part are oppositely arranged along the length direction of the flange part, the intermediate portion connects the first and second flange portions, the web portion connects the intermediate portions of the flange portions, the first flange portion and the second flange portion are connected with the light emitting unit, and the width of the middle portion is smaller than that of the first flange portion and that of the second flange portion.

In some embodiments, the optical detection apparatus further includes a detection module, at least a portion of the detection module is located below the middle frame, the middle frame has a second opening corresponding to the detection module, the detection beam emitted above the protection layer can enter an external object and be transmitted out from the external object, and then the transmitted detection beam can sequentially pass through the protection layer, the display module and the second opening to reach the detection module, the detection module receives the detection beam transmitted out from the external object and converts the detection beam into an electrical signal, so as to obtain biometric information of the external object, and at least a portion of the detection module is located below the transparent area or below the non-transparent area.

In some embodiments, the detection light beam is near infrared light, the display module is a liquid crystal display module or an OLED display module, and the optical detection device can be used for detecting fingerprints, palm prints, toes, and biological prints.

An aspect of the present invention provides an electronic device, including the above-mentioned optical detection apparatus.

The beneficial effects of the utility model reside in that, the utility model discloses optical detection device sets up the transmission module of transmission measuring beam in the below of center or near first opening to guide measuring beam to near the lower surface of protective layer through leaded light unit, make measuring beam can be followed the protective layer and emergent to the outside object that is located the top of protective layer. The utility model discloses utilize below or near first opening space setting transmission module of center, do not influence the setting of other components. In addition, the detection light beam is emitted to the upper part of the protective layer through the light guide unit, so that the loss caused by the transmission of the detection light beam from the display module is avoided, and the utilization rate of the detection light beam is better.

Drawings

FIG. 1 is a schematic view of one embodiment of an optical inspection device of the present invention;

FIG. 2 is a schematic top view of a portion of the optical inspection device of FIG. 1;

FIG. 3 is a schematic partial cross-sectional view of the optical detection device of FIG. 1;

FIG. 4 is a schematic perspective view of a portion of the optical inspection device shown in FIG. 1;

FIG. 5 is a schematic side view of a portion of the light guide unit of FIG. 1;

FIG. 6 is a schematic side view of a modified embodiment of the light guide unit of FIG. 5;

FIG. 7 is a partial schematic view of the light guide unit shown in FIG. 6;

fig. 8A to 8B are schematic views of modified embodiments of an optical detection apparatus including the light guide unit shown in fig. 6;

fig. 9 is a schematic view of an optical path of the light guide unit.

Detailed Description

In the detailed description of the embodiments of the invention, it will be understood that when a substrate, a sheet, a layer, or a pattern is referred to as being "on" or "under" another substrate, another sheet, another layer, or another pattern, it can be "directly" or "indirectly" on the other substrate, the other sheet, the other layer, or the other pattern, or one or more intervening layers may also be present. The thickness and size of each layer in the drawings of the specification may be exaggerated, omitted, or schematically represented for clarity. Further, the sizes of the elements in the drawings do not completely reflect actual sizes.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Further, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In the following description, numerous specific details are provided to provide a thorough understanding of embodiments of the application. One skilled in the relevant art will recognize, however, that the subject technology can be practiced without one or more of the specific details, or with other structures, components, and so forth. In other instances, well-known structures or operations are not shown or described in detail to avoid obscuring the focus of the application.

Fig. 1 is a partial perspective view of an optical detection device 1 according to an embodiment of the present invention. The optical detection device 1 comprises a protective layer 11, a display module 12, a middle frame 13 and a rear cover 14 which are sequentially arranged from top to bottom.

The protective layer 11 includes a non-transparent region 110 and a transparent region 112, and the non-transparent region 110 is located around or at an edge of the transparent region 112. The transparent region 112 is capable of transmitting visible light and invisible light. The non-transparent region 110 is capable of blocking visible light and transmitting invisible light. The invisible light may be a detection light beam for detecting biometric information of an external object.

The protective layer 11 includes an upper surface 111 and a lower surface (not numbered) disposed opposite to each other, and the upper surface 111 includes an upper surface of the transparent region 112 and an upper surface of the non-transparent region 110. The lower surfaces include the lower surface of the transparent region 112 and the lower surface of the non-transparent region 110. The upper surface 111 is the outermost surface of the optical detection apparatus 1, or the upper surface 111 is the outermost surface of an electronic device comprising the optical detection apparatus 1.

Illustratively, the protective layer 11 may include a transparent material, such as, but not limited to, transparent glass, a transparent polymer material, any other transparent material, and the like. The protective layer 11 may be a single-layer structure, or a multi-layer structure. The protective layer 11 is a substantially thin plate having a predetermined length, width and thickness. The protective layer 11 has a longitudinal direction corresponding to the Y axis, a width direction corresponding to the X axis, and a thickness direction corresponding to the Z axis.

Alternatively, in some embodiments, the protective layer 11 may include a transparent substrate (not shown) capable of transmitting visible light and invisible light, and an optical ink layer (not shown) disposed on a lower surface of the non-transparent region 110 of the protective layer 11. Such as, but not limited to, glass, plastic, resin, or any other transparent material. The optical ink layer is, for example and without limitation, an infrared ink capable of transmitting near infrared light and blocking visible light, and the optical detection device 1 can use the near infrared light as a detection beam to realize the biological feature detection of an external object.

It is understood that the protective layer 11 may include a plastic film, a toughened film, or other films that are attached by a user during actual use, and the upper surface 111 of the protective layer 11 is a surface that an external object directly contacts when performing biometric detection. The upper surface 111 is the outermost side of the optical detection apparatus 1, or the upper surface 111 is the outermost side of an electronic device comprising the optical detection apparatus 1. Here, for example, but not limited to, the external object may be a finger and the biometric detection is fingerprint detection or fingerprint feature detection.

The display module 12 is located below the protection layer 11 and can emit visible light through the protection layer 11 to display information, such as but not limited to image display and text display. The protection layer 11 is used for protecting the display module 12 from the external environment. The display module 12 is, for example, but not limited to, a liquid crystal display module. The middle frame 13 is used for supporting the display module 12.

The rear cover 14 is located below the middle frame 13, and the rear cover 14 can be used to receive components between the middle frame 13 and the rear cover 14, such as but not limited to: printed circuit boards, batteries, etc. Alternatively, the rear cover 14 may be positioned below and at least partially around the battery. Alternatively, the center frame 13 and the rear cover 14 may be made of various materials such as, but not limited to, metal, plastic, or glass. The rear cover 14 may be fixedly connected to the middle frame 13.

Fig. 2 is a schematic top view of a portion of an embodiment of the optical detection apparatus 1, which shows a schematic top view of a portion of the middle frame 13, the emission module 16, and the light guide unit 15. Fig. 3 is a partial cross-sectional view of the optical detection device 1 along the line a-a in fig. 2. The middle frame 13 is located below the display module 12. The middle frame 13 has a first opening 131 and a second opening 132. The first opening 131 is located under the non-transparent region 110 of the protection layer 11, and the second opening 132 is located under the transparent region 112 of the protection layer 11. Optionally, the cross section of the first opening 131 is circular or rectangular, and the cross section of the second opening 132 is circular or rectangular. Alternatively, the thickness of the middle frame 13 may be about 0.5 mm, and then, the height of the inner side walls of the first opening 131 and the second opening 132 may be 0.5 mm.

The optical detection device 1 further comprises a light guide unit 15, an emission module 16 and a detection module 19. At least a portion of the light guide unit 15 may be disposed under the non-transparent region 110 of the protective layer 11. The light guide unit 15 is located between the protective layer 11 and the rear cover 14. Optionally, the light guide unit 15 penetrates the first opening 131 and includes portions above and below the first opening 131. Optionally, in some embodiments, a portion of the light guide unit 15 is located in the first opening 131 and a portion of the light guide unit is located above the first opening 131. Optionally, in some embodiments, the light guide unit 15 and the middle frame 13 are different elements or components. In other embodiments, the light guiding unit 15 and the middle frame 13 may also be integrated, for example, the light guiding unit 15 and the middle frame 13 are integrally formed.

Optionally, part or all of the transmitting module 16 is located below the middle frame 13. The detection light beam 101 emitted by the emission module 16 may enter the inside of the light guide unit 15 and be guided by multiple reflection to the vicinity of the lower surface of the protective layer 11 inside the light guide unit 15. The detection beam 101 exits the light guide unit 15 at a position adjacent to the lower surface of the protection layer 11, and after exiting the light guide unit 15, the detection beam 101 enters the protection layer 11 from the lower surface of the protection layer 11 and passes through the protection layer 11 to reach the upper side of the protection layer 11. Therefore, the light guide unit 15 can guide the detection beam 101 from a position below the middle frame 13 adjacent to the emission module 16 to a position adjacent to the lower surface of the protective layer 11.

Optionally, in some embodiments, the detection light beam 101 is totally reflected inside the light guiding unit 15, and the light guiding unit 15 is made of a material that enables the detection light beam 101 to be totally reflected and transmitted inside the light guiding unit 15, for example, but not limited to, the light guiding unit 15 may be an optical fiber.

Optionally, in some embodiments, the light guide unit 15 penetrates through the first opening 131, the first opening 131 has an inner sidewall, and the light guide unit 15 is fixedly connected with at least the inner sidewall of the first opening 131. It is understood that, in other embodiments, the light guide unit 15 may not be connected to the inner sidewall of the first opening 131.

Optionally, in some embodiments, the launching module 16 may be located below the middle frame 13, or the launching module 16 may be located in the first opening 131, or the launching module 16 may be partially located in the first opening 131 and partially located below the first opening 131, or the launching module 16 may penetrate through the first opening 131 and include portions located above and below the first opening 131.

Optionally, in some embodiments, part or all of the emission module 16 may be located under the transparent region 112 of the protection layer 11, or part or all of the emission module 16 may be located under the non-transparent region 110 of the protection layer 11. In other words, at least a portion of the orthographic projection of the emission module 16 on the upper surface 111 of the protection layer 11 is located in the transparent region 111 of the protection layer 11 or in the non-transparent region 112 of the protection layer 11.

Optionally, in other or modified embodiments, part or all of the launching module 16 is located above the first opening 131.

Optionally, in some embodiments, the emission module 16 includes a plurality of light emitting units 161, and the light emitting units 161 can emit the detection light beams 101. The light emitting unit 161 may be one or more of LED (light emitting diode), ld (laser diode), vcsel (vertical cavity surface emitting laser), Mini-LED, Micro-LED, OLED (organic light emitting diode), and qled (quantum dot light emitting diode).

Alternatively, in some embodiments, the upper surface 111 of the protection layer 11 has long sides and short sides perpendicular to each other, the upper surface 111 has a reference line parallel to the long sides or the short sides, and an orthographic projection of the light emitting unit 161 on the upper surface 111 of the protection layer 11 may be symmetrical to or located on the reference line.

Alternatively, in some embodiments, the detection module 19 may be located below the middle frame 13. Alternatively, in other embodiments, the detection module 19 may be located below the second opening 132. Alternatively, in some embodiments, a part of the detection module 19 may be located in the second opening 132, and another part may be located below the second opening 132. Of course, in some embodiments, the detection module 19 may be offset from the second opening 132. For example, but not limited to, in some variations or alternative embodiments of the optical inspection apparatus 1 that employ a periscopic imaging structure, the inspection module 19 may not necessarily be directly opposite to the second opening 132, and even the inspection module 19 may be located at any suitable position. This is not limited in the examples of the present application.

Optionally, in some embodiments, the detection module 19 includes an image sensor, such as but not limited to: the detection module 19 can be used for receiving the detection light beam 101 transmitted by the external object 1000 and converting the detection light beam into an electric signal, and the electric signal can be an image signal used for generating a biological characteristic image of the external object 1000.

The optical inspection apparatus 1 further includes a first circuit substrate 122 connected to the display module 12. The first circuit substrate 122 is electrically connected to the display module 12 and can be used for transmitting an electrical signal associated with driving the display module 12. For example, but not limited to, a chip (IC) associated with driving of the display module 12 may be mounted on the first circuit substrate 122, for example, but not limited to, the display module 12 includes a display panel (not shown) and a backlight unit (not shown) providing visible light for the display panel, and the first circuit substrate 122 may be electrically connected to the display panel and/or the backlight unit. In addition, in some optional embodiments, the chip portion of the detection module 19 may also be electrically connected to the first circuit substrate 122. The first circuit substrate 122 illustrated in fig. 3 may be bent and extended from the display module 12 and then located between the display module 12 and the middle frame 13, but in some other embodiments, the first circuit substrate 122 may also be bent and extended from the display module 12 and then located between the middle frame 13 and the rear cover 14, for example, the first circuit substrate 122 is connected between the middle frame 13 and the rear cover 14 through the first opening 131. This is not a limitation of the present application. Optionally, the first circuit substrate 122 may include or be a flexible circuit board.

Optionally, in some embodiments, there may be a space between the first circuit substrate 122 and the light guide unit 15, and the size of the space may be 0 to 1 mm, for example, 0.5 mm.

Two light guiding units 15 are shown in fig. 2, and each emitting unit 15 corresponds to three light emitting units 161. The light guide unit 15 is configured to guide the detection light beam 101 so that the detection light beam 101 can pass through the protection layer 11 to reach an external object located above the protection layer 11. The above-mentioned number of the light guide unit 15 and the light emitting units 161 is only an exemplary description, and the number of the light emitting units 161 may be one or more. Alternatively, the number of the light guide units 15 may be one or more, each light guide unit 15 corresponds to some of the light emitting units 161, and each light guide unit 15 is used for guiding the detection light beam 101 emitted by the corresponding light emitting unit 161. Alternatively, in a modified embodiment of the optical detection apparatus 1, the light guide unit 15 may be disposed at an intermediate position below the non-transparent region 110 along the X-axis direction, the number of the light guide units 15 is 1, the number of the light emitting units 161 is 4, and the light guide unit 15 transmits the detection light beams 101 emitted by the 4 light emitting units 161 to a position adjacent to the lower surface of the protection layer 11 by reflecting inside the light guide unit 15. Of course, in other or modified embodiments, the number and the positions of the light guide unit 15 and the light emitting unit 161 may have different configurations according to the needs, and all fall within the protection scope of the present application.

The emission module 16 is used for emitting the detection beam 101. The light guide unit 15 is configured to guide the detection light beam 101 emitted by the emission module 16, and the detection light beam 101 guided by the light guide unit 15 can pass through the protective layer 11 and enter the external object 1000 located above the protective layer 11. The detection beam 101 entering the external object 1000 can be transmitted from the external object 1000, and sequentially passes through the protective layer 11, the display module 12, and the second opening 132 to reach the detection module 19. Alternatively, the detection beam 101 may be invisible light. Further, the detection beam 101 may be near infrared light, for example, but not limited to, the detection beam 101 may be near infrared light having a wavelength ranging from 800 nm to 1200 nm. In some embodiments, the detection beam 101 may be near infrared light having a wavelength equal to 850 nanometers or 940 nanometers.

Alternatively, in some embodiments, the detection module 19 may be located directly below the detection area VA or at another suitable position. Optionally, an area where the detection light beam 101 enters the protective layer 11 and exits from the upper surface 111 of the protective layer 11 is an exit area PA, and the detection area VA and the exit area PA may not overlap. In this way, the detection beam 101 reflected by the upper surface 111 of the protective layer 11 when the detection beam 101 exits from the upper surface 111 can be prevented from being received by the detection module 19, and the detection module 19 can be prevented from being adversely affected by collecting the detection beam 101 transmitted from the external object 1000. Of course, the detection area VA and the exit area PA may have a partial overlap, which may be varied.

Optionally, in some embodiments, the detection area VA is located in the transparent area 112 of the protection layer 11. At least part of the exit area PA is located in the non-transparent area 110 of the protective layer 11. The area of the upper surface 111 of the protection layer 11 within the field angle range of the detection module 19 is defined as the field area of the detection module 19 on the upper surface 111 of the protection layer 11. Alternatively, the detection area VA may be a part of the field of view area. Or, the detection area VA is the field of view area. Alternatively, the detection area VA includes at least a part of the field of view area. The detection module 19 may include an image sensor and a lens, and the detection beam 101 transmitted by the external object 1000 passes through the protective layer 11, the display module 12, and the second opening 132 from the detection area VA and is then converged onto the image sensor by the lens, so as to generate a biometric image of the external object 1000.

Fig. 4 is a schematic perspective view of a portion of the optical detection apparatus 1 in fig. 1, showing the light guide unit 15. Fig. 5 is a schematic side view of a portion of the light guide unit 15 in fig. 1. The light guide unit 15 includes a light incident surface 151, a light emitting surface 152, and a reflecting surface 153. The light emitting unit 161 includes a light emitting surface 1611 for emitting the detection light beam 101. The light incident surface 151 faces a light emitting surface 1611 of the light emitting unit 161. The light emitting surface 152 is adjacent to the lower surface of the protection layer 11. For example, but not limited to, the reflective surface 153 may be the remaining surface of the light guide unit 15 except for the light incident surface 151 and the light exiting surface 152. Optionally, the light incident surface 151 may be located below the middle frame 13, or located in the first opening 131, or partially located in the first opening 131 and partially located below the first opening 131, or the light incident surface 151 penetrates through the first opening 131 and includes portions located above and below the first opening 131. Optionally, in some embodiments, the light incident surface 151 and the light emitting surface 1611 may be disposed opposite to each other, and the light incident surface 151 and the light emitting surface 1611 may be disposed close to each other or spaced apart from each other.

The light incident surface 151 is used for allowing the detection light beam 101 emitted by the emission module 16 to enter the light guide unit 15 from the light incident surface 151. The light-emitting surface 152 is used for allowing the detection light beam 101 entering the light guide unit 15 to exit from the light-emitting surface 152. The reflecting surface 153 is used to reflect the detection light beam 101 entering the inside of the light guide unit 15. After the detection light beam 101 enters the light guide unit 15 from the light incident surface 151, the detection light beam is reflected by the reflection surface 153 and transmitted inside the light guide unit 15, so that at least a part of the detection light beam 101 can exit from the light exiting surface 152 and leave the light guide unit 15.

Optionally, in some embodiments, the light guiding unit 15 includes a main body made of a material capable of transmitting the detection light beam 101 and a light reflecting material. The main body has an L-shaped structure, the reflective material covers the side surface of the main body to form the reflective surface 153, and two end surfaces of the L-shaped structure of the main body are the light incident surface 151 and the light emitting surface 152, respectively. The light reflecting material is used to reflect the detection beam 101 such that the detection beam 101 can be transmitted inside the body. Part of the detection light beam 101 can enter the light guide unit 15 from the light incident surface 151, and is transmitted to the light emitting surface 152 by reflection and exits the light guide unit 15. Alternatively, in some embodiments, the body may be glass or resin. The light reflecting material may be a coating film formed on the surface of the body. In other embodiments, the reflective material may be a reflective film capable of reflecting the detection beam 101, and the reflective film may be adhered to the surface of the main body. Generally, the reflective surface 151 is formed by plating a film on the surface of the main body, and relatively speaking, no additional adhesive is needed, and the thickness of the light guide unit 15 can be relatively small. In contrast, the manner of connecting the reflective film and the main body using optical glue or any other adhesive to form the reflective surface 151 may cause the thickness of the light guide unit 15 in the length direction (Y-axis direction) along the protective layer 11 to be slightly larger because of the thicknesses of the adhesive and the reflective film. Of course, since the thickness of the main body itself can be made very thin, the thickness of the light guide unit 15 can be very small, for example, can be smaller than the height of the light emitting module 16.

Optionally, in some embodiments, the emission module 16 further includes a second circuit substrate 162, and the light emitting unit 161 and the light guide unit 15 are disposed on the second circuit substrate 162. The light emitting unit 161 is electrically connected to the second circuit board 162, and the second circuit board 162 is used for providing an electrical signal to the light emitting unit 161.

Optionally, in some embodiments, the second circuit substrate 162 includes a flange portion 1621 and a web portion 1622. The web portion 1622 connects the intermediate portions of the flange portions 1621. The flange portion 1621 and web portion 1622 generally form a T-shaped structure. Alternatively, in some embodiments, the flange portion 1621 is an elongated thin plate having a length direction and a width direction substantially perpendicular to itself, and the web portion 1622 is connected to the flange portion 1621 substantially along the width direction of the flange portion 1621. The flange portion 1621 includes a first flange portion (not numbered), a second flange portion (not numbered), and an intermediate portion (not numbered). The first flange portion and the second flange portion are disposed opposite to each other along the length direction of the flange portion 1621 itself, and the middle portion connects the first flange portion and the second flange portion. The web portion 1622 is connected to the middle portion of the flange portion 1621, and the first and second flange portions are connected to the light emitting unit 161. The first flange portion and the second flange portion have a dimension in the width direction larger than the intermediate portion, and are flush with each other at one side edge connected to the web 1622, and the first flange portion and the second flange portion each have a portion protruding from the intermediate portion on the side facing away from the web. Optionally, when the second circuit board 162 is mounted on the optical detection device 1, the width direction of the flange portion 1621 is substantially parallel to the width axis X of the protection layer 11, and the web portion 1622 extends substantially along the length axis Y of the protection layer 11. The flange 1621 and the web 1622 occupy a small space, and are preferably applicable to the light guide unit 15 and the light emitting unit 161. Such a structure of the second circuit substrate 162 occupies a small space while ensuring line connection and signal driving. In addition, two light guide units 15 are disposed on the first flange portion and the second flange portion, a certain space is provided between the two light guide units 15, and the middle frame 13 may be provided with a USB port (not shown) at a portion between the two light guide units 15. It is understood that the two light guiding units 15 are located below the non-transparent area 110, the non-transparent area 110 of this part can be regarded as the bottom of the optical detection device 1, the USB interface is located approximately in the middle of the outer side of the bottom, and the USB interface can be disposed on the downward extending part of the middle frame 13. An external device can be inserted into the USB interface through a USB plug, and thus the external device and the optical detection apparatus 1 can be electrically connected or communicate data. In the embodiment of the present application, the second circuit board 162 does not affect the optical detection device 1 to have a USB interface at the bottom middle position by adopting the structural design of the flange portion 1621 and the web portion 1622.

Optionally, in some embodiments, the light emitting unit 161 and the flange 1621 are electrically connected through a conductive solder or other conductive medium. The light guide unit 15 and the flange 1621 are connected by glue or other adhesive. Fig. 4 shows that two light guiding units 15 are connected to the first and second flange portions, respectively. Each light guide unit 15 corresponds to 3 light emitting units 161, and the light guide unit 15 is used for guiding the detection light beams 101 emitted by the 3 light emitting units 161. Then, three light emitting units 161 are disposed on each of the first and second flange portions. In other or modified embodiments, the light guide unit 15 may correspond to a different number of light emitting units 161.

Alternatively, in some embodiments, the web portion 1622 may be electrically connected to an external driving circuit, and the external driving circuit is configured to drive the light emitting unit 161. Optionally, in some embodiments, the web portion 1622 may be electrically connected to the detection module 19.

Optionally, in some embodiments, the second circuit substrate 162 may be a flexible circuit board.

Optionally, in some embodiments, the optical detection apparatus 1 further includes a reinforcing plate 17 disposed below the second circuit substrate 162. The reinforcing plate 17 may be disposed below the flange 1621 of the second circuit board 162 to increase the strength of the connection between the second circuit board 162 and the light emitting unit 161 and the light guide unit 15. Illustratively, in some embodiments, the stiffening plate 17 may be made of metal, resin, plastic, or the like.

Alternatively, in some embodiments, the light guide unit 15 may be disposed on the flange 1621 of the second circuit substrate 162, and specifically, different light guide units 15 may be respectively connected to the first flange and the second flange. However, alternatively, in some embodiments, the light guide unit 15 may be directly connected to the reinforcing plate 17, and in this case, the flange 1621 of the second circuit board 162 is connected to only the light emitting unit 161.

Alternatively, in some embodiments, the light guide unit 15 includes a first light guide portion 1501 and a second light guide portion 1502 connected to each other. The first light guide portions 1501 are adjacent to the emission module 16, and the second light guide portions 1502 are adjacent to the protection layer 11. At least a portion of the second light guide part 1502 is positioned under the non-transparent region 110 of the protective layer 11. The first light guide portions 1501 are located below the non-transparent regions 110 of the protective layer 11, or portions of the first light guide portions 1501 are located below the non-transparent regions 110 and portions are located below the transparent regions 112, or the first light guide portions 1501 are located below the transparent regions 112.

Alternatively, in some embodiments, when all of first light directing portions 1501 are positioned under non-transparent regions 110, at least a portion of second light directing portions 1502 can be positioned under non-transparent regions 110.

Optionally, in some embodiments, when the first light guide portions 1501 are located below the non-transparent regions 110, the emission modules 16 may be located below the non-transparent regions 110, or the emission modules 16 may be located below the transparent regions 112, or the emission modules 16 may be located partially below the transparent regions 112 and partially below the non-transparent regions 110. At this time, at least a portion of the second light guide parts 1502 may be positioned under the non-transparent regions 110.

Alternatively, in some embodiments, when all of the first light guide portions 1501 are located below the transparent regions 112, the emission module 16 may be located below the transparent regions 112, and in this case, the second light guide portions 1502 may extend from the lower side of the transparent regions 112 to the side close to the protective layer 11 to the lower side of the non-transparent regions 110. Further optionally, in some embodiments, when the first light guide portions 1501 are partially located under the non-transparent regions 110 and partially located under the transparent regions 112, the emission module 16 may be located under the transparent regions 112, and at least a portion of the second light guide portions 1502 may be located under the non-transparent regions 110.

Alternatively, in some embodiments, first light directing portions 1501 and second light directing portions 1502 are positioned below non-transparent regions 110, and an orthogonal projection of second light directing portions 1502 onto upper surface 111 may be closer to an upper surface of transparent regions 112 than an orthogonal projection of first light directing portions 1501 onto upper surface 111.

Alternatively, in some embodiments, the second light guiding parts 1502 may have different thicknesses at different positions (the thickness of the second light guiding parts 1502 may be understood as the length of the second light guiding parts 1502 in the length direction of the protective layer 11). For example, but not limited to, the second light guiding parts 1502 may have a thickness that is small at the top and large at the bottom. The thickness of the second light guide part 1502 near the middle frame 13 may be large, and a portion of the second light guide part 1502 near the middle frame 13 may be located below the transparent region 112. The thickness of the second light guide part 1502 near the lower surface of the protective layer 11 is small, and the portion of the second light guide part 1502 near the lower surface of the protective layer 11 is located below the non-transparent region 110. Of course, in other or modified embodiments, different positions of the second light guiding portion 1502 may have a uniform thickness.

Alternatively, in some embodiments, the light guide unit 15 may have a substantially L-shaped structure. The detection light beam 101 may enter the light guide unit 15 from the first light guide portion 1501 of the light guide unit 15 having the L-shaped structure, and exit the light guide unit 15 from the second light guide portion 1502 after being transmitted by reflection inside the light guide unit 15. The light guide unit 15 guides the detection beam 101 from a position below the middle frame 13 adjacent to the emission module 16 to the vicinity of the lower surface of the protective layer 11.

Optionally, in some embodiments, the first light guide portion 1501 includes the light incident surface 151. The second light guide portion 1502 includes the light emitting surface 152. At least a portion of first light guide portions 1501 are located within first opening 131 or at least a portion of first light guide portions 1501 are located below first opening 131. The second light guide parts 1502 are connected to the first light guide parts 1501, the second light guide parts 1502 have connection portions connected to the first light guide parts 1501, the second light guide parts 1502 extend upward from the connection portions to positions adjacent to the lower surfaces of the non-transparent areas 110 of the protective layer 11, and at least portions of the second light guide parts 1502 are located above the first openings 131. The first light guide portions 1501 are connected to the second circuit board 162. The first light guide portions 1501 and the second light guide portions 1502 form an L-shaped light guide unit 15. Alternatively, the light incident surface 151 may be regarded as an end surface of the first light guide portion 1501, the light emitting surface 152 may be regarded as an end surface of the second light guide portion 1502, and the reflection surface 153 may be regarded as at least partial side surfaces of the first light guide portion 1501 and the second light guide portion 1502. Optionally, a distance between an orthographic projection of the first light guide portion 1501 on the upper surface 111 and the transparent area 112 is smaller than a distance between an orthographic projection of the second light guide portion 1502 on the upper surface 111 and the transparent area 112.

Optionally, the reflection surface 153 of the light guide unit 15 includes a chamfered surface 154, and the chamfered surface 154 may be a chamfered slope at a joint of the first light guide portion 1501 and the second light guide portion 1502. The chamfered surface 154 can better reflect the detection light beam 101 entering the light guide unit 15 to the position of the light exit surface 152. In addition, the rear cover 14 may have an arc-shaped structure at the chamfer of the light guide unit 15, so that the optical detection device 1 as a whole has better holding feeling and visual effect.

Alternatively, in some embodiments, as shown in fig. 5, the height of the first light guide portion 1501 along the Z axis is H1, and the height of the light emitting unit 161 along the Z axis is H2. The height H1 of the first light guide portions 1501 is greater than or equal to the height H1 of the light emitting units 161. Since the detection light beam 101 has a certain divergence angle when exiting from the light emitting surface 1611, when the light incident surface 151 and the light emitting surface 1611 face each other, the height H1 of the first light guide portion 1501 is greater than or equal to the height H2 of the light emitting unit 161, so that more detection light beams 101 can enter the light guide unit 15. The height H2 of the light emitting unit 161 may be the length of the light emitting unit 161 in the thickness direction (Z axis) of the protective layer 11. The height of first light guide portions 1501 may be a length of first light guide portions 1501 in a thickness direction (Z axis) of protective layer 11.

Further alternatively, the height H1 may be a length of the light incident surface 151 of the first light guide portion 1501 in a direction perpendicular to the upper surface 111 of the protection layer 11, and the height H2 may be a length of the light emitting surface 1611 of the light emitting unit 161 in a direction perpendicular to the upper surface 111 of the protection layer 11.

Generally, the position of the light guiding unit 15 and the light emitting unit 161 at the optical detection device 1 is referred to as the bottom of the optical detection device 1 due to the holding and using habit of the user, and the non-transparent region 110 of the protection layer 11 corresponding to the light guiding unit 15, the first opening 131, and the like is colloquially referred to as the "chin". In order to ensure the biometric detection effect, it is preferable that the detection light beam 101 directly enters the protective layer 11 from the vicinity of the lower surface of the protective layer 11 and then exits onto the external object 1000. It will be appreciated that the display module 12 is disposed opposite the transparent region 112 of the protective layer 11 due to the limited space adjacent to the lower surface of the protective layer 11. If the radiation module 16 is disposed directly adjacent to the lower surface of the protective layer 11, it can only be disposed below the non-transparent region 110 of the protective layer 11. To ensure assembly, the transmitting module 16 and the first circuit substrate 122 need to maintain a tolerance interval. The emission module 16 further includes a light emitting unit 161 and a second circuit board 162, and has a large number of components and complicated wiring. If the transmitting module 16 is disposed immediately below the non-transparent region 110 next to the lower surface of the protective layer 11, the width of the non-transparent region 110 of the protective layer 11 is increased, i.e. the "chin" is wider, which may affect the user experience.

In the embodiment of the present application, only the second light guide part 1502 of the light guide unit 15 is disposed near the lower surface of the non-transparent area 110. The second light guide parts 1502 are positioned under the non-transparent regions 110 of the protective layer 11. The smaller the thickness T of the second light guide part 1502, the smaller the width of the non-transparent region 110 of the protective layer 11 may be. Whereas for the optical detection apparatus 1 or an electronic device comprising said optical detection apparatus 1 the smaller the width of the non-transparent area of the protective layer 11. The narrower the "chin" of the optical detection apparatus 1 is from the appearance. Alternatively, the thickness T may be a length of the second light guiding part 1502 in a length direction (Y-axis direction) of the protective layer 11, and the smaller the thickness T of the second light guiding part 1502, the narrower the "chin" of the protective layer 11. In some embodiments of the present application, the thickness T of the second light guiding portion 1502 is smaller than the height of the emission module 16. Therefore, the optical detection device 1 of the present application can have a narrower jaw. Alternatively, in some embodiments, the height of the emission module 16 may be the length of the emission module 16 along the thickness direction (X-axis) of the protection layer 11. The thickness T of the second light guide parts 1502 may be a length of the second light guide parts 1502 in a length direction (Y axis) of the protective layer 11. For example, but not limited to, the height of the emission module 16 may be approximately equal to the height H2 of the light emitting unit 161 plus the height (not labeled) of the second circuit substrate 162.

Alternatively, in some embodiments, the thickness T may be regarded as the thickness of the portion of the second light guiding part 1502 between the reflective surfaces 153. In some embodiments, the height H2 of the light emitting unit 161 may be 0.3 mm to 0.5 mm, the height of the second circuit substrate 162 in the Z-axis direction may be 0.1 mm, and the thickness T of the second light guiding portion 1502 may be less than 0.3 mm. For example, but not limited to, the thickness T of the second light guiding portion 1502 may be 0.25 mm.

In the embodiment of the present application, the emission module 16 is disposed below the middle frame 13, and the lower side of the middle frame 13 has a larger space to accommodate the emission module 16 relative to the vicinity of the lower side of the non-transparent region 110 of the protection layer 11, and the emission module 16 does not necessarily need to be located directly below the non-transparent region 110. Meanwhile, the detection light beam 101 emitted by the emission module 16 is guided to the vicinity of the lower surface of the protection layer 11 through the light guide unit 15, in this way, compared with the case that the emission module 16 is directly arranged at the position, which is located above the middle frame 13, of the vicinity of the lower surface of the protection layer 11, the optical detection device 1 and the electronic device including the optical detection device 1 in the embodiment of the present application can realize a narrow chin, so that better user experience is achieved.

Optionally, the light emitting surface 152 is disposed obliquely with respect to the upper surface 111 of the protection layer 11. Further, a reference point is arbitrarily selected from the light emitting surface 152 as a normal perpendicular to the light emitting surface 152, the normal and the upper surface 111 have an intersection point, and the intersection point is located between an orthographic projection of the reference point on the upper surface 111 and the detection area VA. It is understood that the external object 1000 may directly contact the detection area VA when performing the biometric detection. Since the light guide unit 15 has the light emitting surface 152 disposed obliquely to the upper surface 111, the light emitting surface 152 is adjacent to the lower surface of the protection layer 11. After the detection light beam 101 leaves the light guide unit 15 and passes through the protection layer 11, more detection light beams 101 can enter the external object 1000 located above the protection layer 11, so that the utilization rate of the detection light beams 101 is improved. The detection beam 101 entering the external object 1000 can be transmitted from the external object 1000 and enter the protective layer 11 from the detection area VA.

Referring to fig. 6, a light guide unit 15a shown in fig. 6 is a side view of a changeable embodiment of the light guide unit 15 in fig. 5. The light guide unit 15a and the light guide unit 15 have substantially the same structure. The light guide unit 15a includes a first light guide portion 1501 and a second light guide portion 1502a, the first light guide portion 1501 is connected to the second light guide portion 1502a, and the second light guide portion 1502a extends upward from a position where the first light guide portion 1501 is connected to a position near a lower portion of the protective layer 11. The first light guide portions 1501 are adjacent to the emission units 161 of the emission module 16. The first light guide portions 1501 include light incident surfaces 151, and the light incident surfaces 151 face light emitting surfaces 1611 of the light emitting units 161. The second light guide portion 1502a includes a light emitting surface 152 a. The first light guide portions 1501 and the second light guide portions 1502 further include reflective surfaces 153. The reflecting surface 153 may be a part or all of the surface of the light guide unit 15a except the light incident surface 151 and the light emergent surface 152 a. The detection light beam 101 emitted by the light emitting unit 161 can enter the light guiding unit 15a from the light incident surface 151, and leave the light guiding unit 15a from the light emitting surface 152a after being reflected by the reflecting surface 153 inside the light guiding unit 15 a.

The second light guiding portion 1502a further includes a first sub-reflecting surface 1531 and a second sub-reflecting surface 1532. The first sub-reflecting surface 1531 and the second sub-reflecting surface 1532 are at least part of the reflecting surface 153. The light emitting surface 152a is connected to the second sub-reflecting surface 1532 and disposed adjacent to the lower surface of the protection layer 11. The first sub-reflecting surface 1531 is substantially perpendicular to the upper surface 111 of the protective layer 11. The second sub-emitting surface 1532 is disposed obliquely to the upper surface 111, and the light emitting surface 152a is disposed obliquely to the upper surface 111. The first sub-reflecting surface 1531 may be connected to the second sub-reflecting surface 1532. The first sub-reflecting surface 1531 is located below the light emitting surface 152 a. A part or all of the first sub-reflecting surface 153 is located below the second sub-reflecting surface 1532. The second sub-reflecting surface 1532 is connected to the light emitting surface 152a and forms a protrusion structure facing the protection layer 11. For example, but not limited to, the raised structures are pointed raised structures.

Optionally, in some embodiments, the first sub-reflecting surface 1531 and the second sub-reflecting surface 1532 may be perpendicular to the upper surface 111, the second sub-reflecting surface 1532 is connected to the light emitting surface 152a, and the light emitting surface 152a is inclined with respect to the upper surface 111. Optionally, in some embodiments, the first sub-reflecting surface 1531 may be perpendicular to the upper surface 111, the second sub-reflecting surface 1532 is disposed obliquely with respect to the upper surface 111, the second sub-reflecting surface 1532 is connected to the light-emitting surface 152a, and the light-emitting surface 152a is perpendicular with respect to the upper surface 111.

Optionally, in the above embodiment, the second sub-reflecting surface 1532 and the light emitting surface 152a may include a plane and/or a curved surface. The embodiments of the present application do not limit this.

Illustratively, the length of the second light guide parts 1502a in the length direction (Y-axis direction) of the protective layer 11 is a thickness T of the second light guide parts 1502a, which is less than the height H2 of the light emitting units 161 (see fig. 5). An orthographic height H3 of the second sub-reflecting surface 1532 in a plane parallel to the thickness direction (Z-axis direction) of the protective layer 11 and perpendicular to the upper surface 111 may be 0.3 mm to 0.5 mm, for example, but not limited to, a height H3 of the second sub-reflecting surface 1532 in the thickness direction (Z-axis direction) of the protective layer 11 may be about 0.4 mm. The heights of the orthographic projections of the light emitting surface 152a and the second sub-reflecting surface 1532 in the plane perpendicular to the upper surface 111 are substantially equal. The thickness T of the second light guiding portion 1502a may be less than 0.3 mm, for example, but not limited to, the thickness T of the second light guiding portion 1502a may be about 0.2 mm.

Fig. 7 is an enlarged schematic view of the light emitting surface 152a and the second sub-reflecting surface 1532 in fig. 6. Optionally, in some embodiments, when both the second sub-emitting surface 1532 and the light emitting surface 152a are disposed obliquely with respect to the upper surface 111, an orthogonal projection of the light emitting surface 152a on the upper surface 111 of the protection layer 11 is closer to the upper surface of the transparent region 112 of the protection layer 11 than an orthogonal projection of the second sub-reflecting surface 1532 on the upper surface 111.

Optionally, in some embodiments, a plane perpendicular to the upper surface 111 along the thickness (Z axis) direction from the intersection of the second sub-reflecting surface 1532 and the light emitting surface 152a is defined as the first reference plane K1. A center point of the sensing area VA is C, and a plane perpendicular to the upper surface 111 and parallel to the first reference plane K1 including the center point C of the sensing area VA is defined as a second reference plane K2. The perpendicular distance between the first reference plane K1 and the second reference plane K2 along the length axis (Y-axis) is a first reference distance L1. The first reference distance L1 substantially corresponds to the horizontal distance between the light guide unit 15a and the center of the detection area VA (in this case, the X-Y plane is regarded as a horizontal plane). A first included angle α 1 is formed between the light emitting surface 152a and the first reference surface K1, and a second included angle α 2 is formed between the second sub-reflecting surface 1532 and the first reference surface K1. The first included angle alpha 1 and the second included angle alpha 2 satisfy: alpha 1 is more than 0 degree and alpha 2 is more than 90 degrees. For example, but not limiting of, the first included angle α 1 may be 0 to 10 degrees, and the second included angle α 2 may be 10 to 40 degrees. In this case, the detection beam 101 can be emitted from the upper surface 111 and can be favorably irradiated to the external object 1000 located above the detection area VA. Of course, alternatively, in some embodiments, the light emitting surface 152a may be perpendicular to the upper surface 111.

Fig. 8A is a partial top view of an alternative embodiment of the optical detection apparatus 1 including the light guide unit 15a along the Z-axis, and fig. 8A shows the first reference plane K1, the second reference plane K2, the detection area VA, the center point C of the detection area VA, and the light guide unit 15 a. Referring to fig. 8B, a partial top view of another modified embodiment of the optical detection apparatus 1 including a light guide unit 15a along a Z-axis downward direction is schematically shown, the structure of the embodiment in fig. 8B is substantially the same as that of the embodiment in fig. 8A, and the main difference is that the embodiment shown in fig. 8B includes only one light guide unit 15a, the light guide unit 15a is located below the non-transparent region 110, and a front projection of the light guide unit 15a on the upper surface 111 is located on a central line 113 of the upper surface 111 parallel to a length direction (Y-axis) of the protection layer 11. The embodiment shown in fig. 8A includes two light guiding units 15a respectively located at two sides of the middle line 113. The light guide units 15a may have different numbers and positions, and all belong to the scope of the protection layer of the present application.

On the second reference plane K2, a region having a height H4 from the upper surface 111 and a distance ± W1/2 from the center point C is defined as a detection region, as shown in fig. 8, the length of the detection region in the X-axis direction is W1, and the distance between both side edges of the detection region in the X-axis direction and the center point C of the detection region VA is W1/2.

In performing biometric sensing, the external object 1000 is generally positioned above or in direct contact with the sensing area VA. For convenience of understanding, the detection region may be used to simulate a light receiving region when the external object 1000 is located above the detection region VA, and therefore, if the detection beam 101 exits the light guide unit 15 and exits from the protective layer 11 to be able to more irradiate the detection region, it may be considered that the detection beam 101 exits from the protective layer 11 to be able to more irradiate the external object 1000 to enter the external object 1000 and then to be transmitted from the external object 1000.

For example, but not limited to, the first reference distance L1 may be 12 mm to 16 mm, the detection area VA may be a circle with a diameter of 5 mm to 10 mm or a rectangle with a side of 5 mm to 10 mm, and when the length W1 of the detection area may be about 10 mm and the height H4 may be about 8 mm, the second included angle α 2 may be about 27 degrees to 35 degrees. At this time, the detection beam 101 can be irradiated onto the detection region more after exiting from the protective layer 11 (the proportion of the detection beam 101 irradiated onto the detection region is about 10% to 13% of the detection beam 101 exiting from the protective layer 11), that is, the optical detection apparatus including the light guiding unit 15a can have a better optical imaging quality and a better biometric characteristic detection effect.

Optionally, in some embodiments, the first reference distance L1 may be 12 mm, and the second included angle α 2 may be 27 degrees; or the first reference distance L1 may be 16 mm, and the second included angle α 2 may be 35 degrees; alternatively, the first reference distance L1 may be 12 mm to 16 mm, and the second included angle α 2 may be 27 degrees to 35 degrees. In these embodiments, when the external object 1000 contacts the detection area VA, about 10% to 13% of the detection beams 101 of all the detection beams 101 exiting from the protective layer 11 can be irradiated onto the external object 1000 located at the detection area VA.

Referring to fig. 9, a schematic optical path diagram of the detection beam 101 emitted from the light guide unit 15 and the light guide unit 15a is shown. The light guide unit 15a is disposed at the light emitting surface 152a of the second light guide portion 1502a, and is connected to the light emitting surface 152a, and the second sub-reflecting surface 1532 is inclined to the upper surface 111 of the protection layer 11. It can be understood that, since the second sub-reflecting surface 1532 is disposed obliquely to the upper surface 111, the detection beam 101 reflected by the second sub-reflecting surface 1532 can enter the protective layer 11 at a larger incident angle and exit from the upper surface 111 of the protective layer 11 at a larger exit angle. In this way, the emission area PA of the upper surface 111 of the detection beam 101 can be closer to the detection area VA. Moreover, the detection beam 101 can be emitted to a position above the detection area VA closer to the upper surface 111, that is, a position where the external object 1000 is located. Then, of the detection light beams 101 emitted from the upper surface 111 of the protective layer 11, the amount of the detection light beams 101 that can reach and enter the external object 1000 is large. When biometric detection is performed, the external object 1000 touches the detection area VA, and the light guide unit 15a can better make the detection beam 101 reach the external object.

Of course, compared to the prior art, the light guide unit 15a or the modified embodiment thereof can guide the detection light beam 101 emitted by the emission module 16 to the vicinity of the lower surface of the protection layer 11, and the optical detection device 1 and the modified embodiment thereof can achieve the technical effect of narrow jaw, and have better user experience.

Taking the external object 1000 as a finger as an example, since the fingerprint of the finger has concave-convex patterns (e.g., valleys and ridges of the fingerprint), when the finger contacts the upper surface 111, the ridges of the fingerprint cling to the upper surface 111, and air is separated between the valleys of the fingerprint and the upper surface 111. When the detection beam 101 is transmitted from the ridge and the valley, the ridge is in direct contact with the first surface 111, and the detection beam 101 can be refracted directly from the ridge through the first surface 111, for example, but not limited to, into the protective layer 11 through the upper surface 111. The valleys are spaced from the upper surface 111 by air, and the detection beam 101 needs to be refracted into the air from the valleys before being refracted through the upper surface 111 by the air. The detection beam 101 transmitted through the upper surface 111 from the ridges and valleys of the fingerprint has different intensities corresponding to the ridges and valleys of the fingerprint due to the difference in refractive index between the finger and the air, loss of the detection beam 101 when passing through the air, and the like. Fig. 4 illustrates an example where the external object 1000 is a finger, and those skilled in the art will understand that the external object 1000 may be a palm, a sole, a skin, or the like. As can be seen from the above, the detection beam 101 transmitted from the external object 1000 carries the biometric information of the external object 1000, and the biometric information may be a fingerprint, a toe print, a palm print, a skin print, a blood vessel, and the like.

The emission module 16 of the optical detection device 1 is used as a light source for emitting the detection light beam 101, and is located below the middle frame 13, and meanwhile, since the middle frame has the first opening 131, the light guide unit 15 penetrates through the first opening 131 and includes portions located above and below the first opening 131, the detection light beam 101 is guided to the vicinity of the lower surface of the protection layer 11 from below the middle frame 13, and the detection light beam 101 can pass through the protection layer 11 to enter the inside of the external object 1000 after leaving the light guide unit 15. Of course, in other embodiments, the launching module 16 may also be located in the first opening 131, or partially located below the first opening 131. A battery, a circuit board, a chip, etc. may be generally disposed between the middle frame 13 and the rear cover 14. Compared with the narrow space above the middle frame 13, the space below the middle frame 13 is relatively large, and the emission module 16 can be disposed below the middle frame 13, inside the first opening 131, above or below the first opening 131 without affecting the disposition of other elements or components of the display device 10. In addition, the detection light beam 101 directly leaves the light unit 15 near the lower surface of the protective layer 11 after being transmitted inside the light guide unit 15, so that the detection light beam 101 is prevented from passing through the display module 11 and being lost.

In the embodiment of the present application, the display module 12 may include a display panel and a backlight unit located below the display panel. The display module 12 may be a liquid crystal display module. The display panel may be a liquid crystal display panel, and the display panel may include two substrates facing each other and a liquid crystal layer interposed between the two substrates. The backlight unit is used for providing visible light for the display panel. The backlight unit comprises a reflecting sheet, a light guide plate and an optical film layer which are sequentially stacked from bottom to top. The backlight unit further includes a backlight disposed adjacent to one side surface of the light guide plate. The backlight emits visible light, the visible light enters the light guide plate from the side face of the light guide plate close to the backlight, and the visible light is guided by the light guide plate and then is emitted to the display panel through the optical film layer. The reflective sheet is used for reflecting the visible light emitted from the bottom surface of the light guide plate back to the light guide plate. The optical film layer serves to brighten and/or diffuse visible light transmitted therethrough. The display module 12 can transmit the detection beam 101.

It should be noted that the present application is not limited thereto, and the display module 12 may be other suitable display modules, display components, or displays. Alternatively, in some embodiments, the display module 12 may be a self-luminous display device, and the display module 12 and the protective layer 11 together form a self-luminous display device. Optionally, in other or modified embodiments, the display module 12 includes two opposite substrates and a display layer located between the substrates, and the display layer may be an Organic Light Emitting Diode (OLED) layer or a liquid crystal layer.

Above-mentioned embodiment or change embodiment and corresponding change of this application set up in about protective layer, display module assembly, emission module, leaded light unit, center, luminous unit, outgoing area, detection area etc. structure, position also can use the utility model discloses an in other embodiments, obtain embodiment from this and replace, warp, combination, split, extension, omit etc. all belong to the utility model discloses scope of protection.

It should be noted that, the upper surface, the lower surface, the light-emitting surface, the light-incident surface, the light-emitting surface, etc. that may appear in the description of the present application may be a real surface that actually exists, and may also be an imaginary surface, which does not affect the implementation of the technical solution created by the present application, and all belong to the protection scope of the present application. In addition, "overlap", and the like, which may occur in the description of the present application, are to be understood as having the same meaning and being replaceable with each other.

It should be noted that, those skilled in the art can understand that, without creative efforts, some or all of the embodiments of the present invention, and some or all of the deformation, replacement, alteration, split, combination, extension, etc. of the embodiments should be considered as covered by the inventive idea of the present invention, and belong to the protection scope of the present invention.

Any reference in this application to "one embodiment," "an embodiment," "example embodiment," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature or structure is described in connection with any embodiment, it is submitted that it is within the purview of one skilled in the art to effect such feature or structure in connection with other ones of the embodiments.

The orientations or positional relationships indicated in the specification of "length", "width", "upper", "lower", "left", "right", "front", "rear", "back", "front", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., which may appear in the present invention, are orientations or positional relationships indicated on the basis of the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Like reference numbers and letters refer to like items in the figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance. In the description of the present invention, "plurality" or "a plurality" means at least two or two unless specifically defined otherwise. In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, "disposed," "mounted" or "connected" is to be understood in a broad sense, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. The terms used in the following claims should not be construed to limit the invention to the specific embodiments disclosed in the specification. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An optical inspection apparatus, comprising:

2. The optical detection device according to claim 1, wherein the light-emitting surface is located above the middle frame and below the non-transparent region, the light-emitting surface is adjacent to the protective layer, at least a portion of the light-incident surface faces the emission module, the light guide unit further includes a reflection surface, the reflection surface is a portion or a whole surface of the light guide unit except the light-incident surface and the light-emitting surface, and the reflection surface is configured to reflect the detection light beam entering the light guide unit.

3. The optical inspection device of claim 1, wherein at least a portion of the light incident surface is located below the middle bezel when at least a portion of the emission module is located below the middle bezel; when at least part of the emission module is positioned in the first opening, at least part of the light incident surface is positioned in the first opening.

4. The optical inspection device according to claim 1, wherein the protection layer includes an upper surface and a lower surface which are oppositely disposed, the upper surface includes an upper surface of the transparent region and an upper surface of the non-transparent region, the lower surface includes a lower surface of the transparent region and a lower surface of the non-transparent region, the upper surface of the protection layer has a detection region which can be directly touched by an external object, when the external object contacts the detection region, the detection beam emitted to the upper side of the protection layer can enter the inside of the external object and then be transmitted, the transmitted detection beam can enter the protection layer from the detection region, and the orthographic projection of the emission module on the upper surface of the protection layer is located between the orthographic projection of the light guide unit on the upper surface and the detection region.

5. The optical inspection device according to claim 4, wherein the area where the inspection light beam exiting the light guide unit exits from the upper surface of the protective layer is an exit area, and the exit area and the inspection area do not overlap or partially overlap.

6. The optical detection device according to claim 1, wherein the light guide unit includes a first light guide portion adjacent to the emission module and a second light guide portion adjacent to the protective layer, the first light guide portion includes the light incident surface, the second light guide portion includes the light emitting surface, all of the first light guide portion is located below a non-transparent region of the protective layer, or a portion of the first light guide portion is located below the non-transparent region and a portion is located below the transparent region, or all of the first light guide portion is located below the transparent region;

at least a portion of the second light directing portion is positioned below the non-transparent region.

7. The optical inspection device of claim 1, wherein some or all of the emission modules are located below a transparent region of the protective layer or some or all of the emission modules are located below a non-transparent region of the protective layer.

8. The optical inspection device as claimed in claim 1, wherein the emission module includes a light emitting unit for emitting the inspection beam, the light emitting unit includes a light emitting surface for emitting the inspection beam, and the light emitting surface faces the light incident surface.

9. The optical detection device according to claim 1, wherein the light guide unit includes a first light guide portion adjacent to the emission module and a second light guide portion adjacent to the protective layer, the second light guide portion being coupled to the first light guide portion, the second light guide portion having a coupling portion coupled to the first light guide portion, the second light guide portion extending upward from the coupling portion to a position adjacent to a lower surface of the non-transparent region, at least a portion of the second light guide portion being positioned above the first opening.

10. The optical inspection device according to claim 9, wherein when at least a portion of the emission module is positioned under the middle bezel, at least a portion of the first light guide portion is positioned under the middle bezel; when at least part of the emission module is positioned in the first opening, at least part of the first light guide part is positioned in the first opening.

11. The optical detection device according to claim 9, wherein a thickness of the second light guide portion is smaller than a height of the emission module, the thickness of the second light guide portion is a length of the second light guide portion along a length direction of the protective layer, and the height of the emission module is a length of the emission module along the thickness direction of the protective layer.

12. The optical inspection device as claimed in claim 9, wherein the emission module includes a light emitting unit for emitting the inspection light beam, the light emitting unit is disposed adjacent to a light incident surface of a first light guide portion, a height of the first light guide portion is greater than or equal to a height of the light emitting unit, the height of the first light guide portion is a length of the first light guide portion along a thickness direction of the protection layer, and the height of the light emitting unit is a length of the light emitting unit along the thickness direction of the protection layer.

13. The optical detection device according to claim 9, wherein an end surface of the first light guide portion is the light incident surface, an end surface of the second light guide portion is the light exit surface, and remaining portions or all surfaces of the first light guide portion and the second light guide portion excluding the light incident surface and the light exit surface are reflection surfaces, and a detection light beam can enter a light guide unit from the light incident surface, and leave the light guide unit from the light exit surface after being reflected by the reflection surfaces in the light guide unit, and the detection light beam is transmitted inside the light guide unit by being reflected on the reflection surfaces.

14. The optical inspection device according to claim 13, wherein the reflection surface includes a chamfered surface, and the chamfered surface is a chamfered slope at a junction of the first light guide part and the second light guide part.

15. The optical inspection device of claim 13, wherein the light guide unit includes a main body and a light reflecting material covering at least a portion of a surface of the main body to form the reflecting surface, the light reflecting material being capable of reflecting the inspection light beam; or the light guide unit is made of a material which can enable the detection light beam to be transmitted in a total reflection manner in the light guide unit, and the detection light beam is totally reflected in the light guide unit.

16. The optical inspection device as claimed in claim 13, wherein the protection layer has an upper surface and a lower surface opposite to each other, the display module is disposed adjacent to the lower surface of the protection layer, the upper surface of the protection layer includes an inspection area for an external object to touch, the inspection beam can be transmitted out after entering the external object and can enter the protection layer from the inspection area, the light exit surface is disposed obliquely with respect to the upper surface of the protection layer, a normal perpendicular to the light exit surface is taken from the reference point with any point of the light exit surface as a reference point, the normal and the upper surface have an intersection point, and the intersection point is located between a forward projection of the reference point on the upper surface and the inspection area.

17. The optical inspection device of claim 1, wherein the light guide unit includes a first light guide portion and a second light guide portion, the first light guide portion and the second light guide portion are connected, the first light guide portion is adjacent to the emission module, the second light guide portion extends upward from a connection point with the first light guide portion to a position near a lower side of the protection layer, the first light guide portion includes the light incident surface, the emission module includes a light emitting unit, the light emitting unit includes a light emitting surface for emitting the inspection light beam, at least a portion of the light incident surface of the first light guide portion faces the light emitting surface of the light emitting unit, the second light guide portion includes the light emitting surface, the first light guide portion and the second light guide portion further include a reflection surface, and the reflection surface is a portion or a whole surface of the light guide unit except for the light incident surface and the light emitting surface, the detection light beam emitted by the light emitting unit can enter the light guide unit from the light incident surface and leave the light guide unit from the light emergent surface after being reflected by the reflecting surface in the light guide unit.

18. The optical inspection device of claim 17 wherein the protective layer includes oppositely disposed upper and lower surfaces, the second light guide part further includes a first sub-reflecting surface and a second sub-reflecting surface, the first sub-reflecting surface and the second sub-reflecting surface being at least part of the reflecting surface, the light-emitting surface is connected with the second sub-reflecting surface and is arranged adjacent to the lower surface of the protective layer, the first sub-reflecting surface is positioned below the light-emitting surface, the first sub-reflecting surface is partially or completely positioned below the second sub-reflecting surface, the second sub-reflecting surface and the light emitting surface are obliquely arranged relative to the upper surface, or the second sub-reflecting surface is vertical to the upper surface and the light-emitting surface is obliquely arranged relative to the upper surface, or the second sub-reflecting surface inclines relative to the upper surface and the light-emitting surface is vertically arranged relative to the upper surface of the protective layer.

19. The optical inspection device according to claim 18, wherein the upper surface of the passivation layer includes a detection area for being touched by an external object, the inspection beam can enter the external object and then transmit therethrough, and can enter the passivation layer from the detection area, when the second sub-emitting surface and the light emitting surface are both disposed obliquely with respect to the upper surface, an orthogonal projection of the light emitting surface on the upper surface of the passivation layer is closer to the upper surface of the transparent area of the passivation layer than an orthogonal projection of the second sub-reflecting surface on the upper surface, a plane perpendicular to the upper surface in a thickness direction from an intersection line of the second sub-reflecting surface and the light emitting surface is defined as a first reference surface, a second included angle is formed between the second sub-reflecting surface and the first reference surface, and a plane perpendicular to the upper surface and parallel to the first reference surface and including a center point of the detection area is defined as a second reference surface, the vertical distance between the first reference surface and the second reference surface is a first reference distance which is 12 mm to 16 mm, and the second included angle is 27 degrees to 35 degrees.

20. The optical inspection device as claimed in claim 19, wherein the light-exiting surface and the second sub-reflecting surface have equal projection heights in a plane parallel to the width direction of the protection layer and perpendicular to the upper surface of the protection layer, the projection heights are 0.3 mm to 0.5 mm, and the thickness of the second light guiding portion along the length direction of the protection layer is less than 0.3 mm.

21. The optical inspection device according to claim 1, wherein the emission module includes a light emitting unit and a second circuit board, the light emitting unit is disposed on the second circuit board, the light emitting unit is used for emitting the inspection light beam, the light emitting unit is electrically connected to the second circuit board, the second circuit board is used for providing the light emitting unit with the electrical signal, the second circuit board includes a flange portion and a web portion, the flange portion includes a first flange portion, a second flange portion and a middle portion, the first flange portion and the second flange portion are disposed opposite to each other along a length direction of the flange portion, the middle portion connects the first flange portion and the second flange portion, the web portion connects the middle portion of the flange portion, the first flange portion and the second flange portion connect the light emitting unit, the width of the middle portion is smaller than the width of the first flange portion and the width of the middle portion is smaller than the second flange portion Is measured.

22. The optical inspection device according to claim 1, further comprising an inspection module, at least a portion of the inspection module being located below the middle frame, the middle frame having a second opening corresponding to the inspection module, wherein the inspection beam emitted above the protective layer can enter and be transmitted out from the external object, and then the transmitted inspection beam can sequentially pass through the protective layer, the display module and the second opening to reach the inspection module, the inspection module receives the inspection beam transmitted by the external object and converts the inspection beam into an electrical signal, so as to obtain the biometric information of the external object, and at least a portion of the inspection module is located below the transparent area or below the non-transparent area.

23. The optical inspection device of claim 1, wherein the inspection beam is near infrared light, the display module is a liquid crystal display module or an OLED display module, and the optical inspection device can be used for inspecting fingerprints, palm prints, toes, and biological prints.

24. An electronic device, characterized in that it comprises an optical detection device according to any one of claims 1 to 23.